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Update configure-upgrade-etcd.md to give an example use-case for snapshot using options given by etcdctl

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ganeshniyer 2021-03-22 11:52:56 +05:30 committed by GitHub
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@ -269,6 +269,21 @@ If etcd is running on a storage volume that supports backup, such as Amazon
Elastic Block Store, back up etcd data by taking a snapshot of the storage
volume.
### Snapshot using etcdctl options
We can also take the snapshot using various options given by etcdctl. For example
```shell
ETCDCTL_API=3 etcdctl --h
```
will list various options avilable with etcdctl. If you want to take a snapshot by specifying various options available here, you can do so. For example, to take a snapshot by specifying the endpoint, certificates etc is as given below
```shell
ETCDCTL_API=3 etcdctl --endpoints=[127.0.0.1:2379] --cacert=<trusted-ca-file> --cert=<cert-file> --key=<key-file> snapshot save <backup-file-location>
```
where, <trusted-ca-file>, <cert-file> and <key-file> can be obtained by looking at the description of the etcd pod.
## Scaling up etcd clusters
Scaling up etcd clusters increases availability by trading off performance.